I need help as to why code B is producing a different result The code below (CODE A) produces the correct output (match) However, the below (CODE B) produces a wrong output (no match) Answer To check a regex in an if-statement you’ll need to use =~ instead off ==; Both will match as expected. Try it onl…
Redirect file in linux using length [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question Am trying to redirect the file based on the length. I have a file having the value, I like L…
OpenCV 2.4.11 Compilation For ROS ORB_SLAM2 Fails
I am trying to get orb_slam2_ros to compile and it needed an OpenCV version higher than 2.3. I have 4.2.0 but it doesn’t work but according to ROS, it has been tested to work on 2.4.11. Here is what I did: Download the source zip file. Extract it. Go into the directory and create a build folder. Go into…
dlopen Segmentation fault error when get a instance from shared library’s exported function
I have been stuck in a problem for several days when using dlopen/dlsym to deal with the shared object. I desperately need your help! There are three headers/source files： Animal.h, Animal.cpp and test.cpp, and two products: libanimal.so and a.out. Here is the source code: Animal.h: Animal.cpp and the last on…
CRC user’s guide for file compare
Can someone point me to a CRC user’s guide for file compare? I have a requirement to use CRC to compare and confirm two files match. I have reviewed this site for how to use to use CRC with no real luck. I have also looked for a CRC user’s guide for file compare with no luck. Answer You compute
Create a dictionary from the ouput of the program
This is a Python Program to get all the captions from youtube link: and the output of the above program is: But I want to get only the lang and code from the above output in a dictionary pair. Thanks in Advance. Answer It’s pretty simple If you want a one-liner Output
How to print only disk usage percentage of linux?
How to print only disk usage percentage of linux similar to memory percentage. for memory percentage i’m using this command: output: like this is there any command for knowing disk usage percentage ? Answer Use df: For one mount point: Percent usage: Excluding header:
‘E: Unable to locate package hydra’ In termux
I started to use termux in my cellphone, and looking for information I find that I can install hydra in it. However, when I use the comand All I get is an error message as you can see in the title. I’ve tried to update and upgrade the system several times, but I’m still getting the same error. So,…
Why are files not found from parallel folders CMake
To have my .cpp and .h files a little bit sorted up pending on their responsibilitie I decided to put them into seperate folders I used the following structure: root | -CMakeLists.txt [rootCmakeList] src | -main.cpp …….| ……. math …….| …….-CMakeLists.txt[mathCmak…
Cannot run Apache2 server in ubuntu [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …